Use of titles - is this sexist?

Local Parish council and borough council refer to the few women involved with their titles. So for example a woman will be Councillor Mrs Brown or Mrs L Brown but a man would be Councillor Brown or L Brown.

Given that they are mostly over 60 is this a different generation showing of respect thing? To me its rude as its just a statement of a woman's marital status which is irrelevant. Either include everyone's title or none.